
from flask import render_template, current_app, session, request, jsonify, g

from info import redis_store, constants
from info.models import User, News, Category
from info.utils.common import  user_login_data
from info.utils.response_code import RET
from . import index_blu

@index_blu.route('/news_list')
def news_list():
    """
    获取首页新闻数据
    :return:
    """

    # 1. 获取参数
    # 新闻的分类id
    cid = request.args.get("cid", "1")
    page = request.args.get("page", "1")
    per_page = request.args.get("per_page", "10")

    # 2. 校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数")

    filters = []
    if cid != 1:  # 查询的不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 3. 查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    # 取到当前页的数据
    news_model_list = paginate.items  # 模型对象列表
    total_page = paginate.pages
    current_page = paginate.page

    # 将模型对象列表转成字典列表
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())
#上一次由于news_dict_li.append(news)没有.to_basic_dict()导致页面不能加载

    data = {
        "total_page": total_page,
        "current_page": current_page,
        "news_dict_li": news_dict_li
    }
    for news in news_dict_li:
        print(news)
    return jsonify(errno=RET.OK, errmsg="OK", data=data)






@index_blu.route('/')
@user_login_data
def index():
    '''
    显示首页
    1. 如果用户已经登录，将当前数据传入模板之中
    :return:
    '''

    # user =query_user_data() #使用导包函数的方法
    user = g.user
    # user = None #实验
    # 向redis中保存一个值 name itcast
    # redis_store.set("name", "itcast")

    # 2.显示右边新闻排行
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li =[]
    # 遍历对象列表，将对象列表添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询分类数据，通过模板渲染出来
    category_li = []
    categories =  Category.query.all()
    for category in categories:
        category_li.append(category.to_dict())

    data = {
        "user_info": user.to_dict() if user else None,
        "news_dict_li" : news_dict_li,
        "category_li" : category_li
    }
    for news  in news_dict_li:
        print(news)
    return render_template('news/index.html', data=data)

@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')